4. In an SS1 class, there are \( 52 \) students, \( 40 \) offer biology and \( 35 \) offer chemistry. If \( 11 \) do not offer any of the subjects. a. Draw the Venn diagram to represent the information.
Joe earns \( \$ 9 \) per hour. He worked \( x \) hours on both Wednesday and Friday, and \( 8 \) hours on both Tuesday and Saturday. Write an expression to represent how much Joe earned.